#app {
  background-color: #f90;
  border: 1px solid black;
}

#app .container {
  font-size: 30px;
}

#app a:hover {
  color: aquamarine;
  font-size: 30px;
}

#app .box {
  background-color: chartreuse;
  color: crimson;
  width: 100%;
  height: 100px;
}
